Is it permissible to pray in clothes that have bloodstains from wounds and allergies that do not disappear with washing?

What flows from the body is sometimes excused, and other times its washing is obligatory. In the case where blood exiting wounds must be washed, it must be washed until its color disappears, unless removing the color is difficult. The majority of jurists hold that removing the color of impurity is obligatory if easy, but if its removal is difficult, the spot becomes pure by washing, and the persistence of the color does not matter, based on the hadith of Khawlah bint Yasar.